A proposed $16 billion billion plan to address back bay flooding is raising concerns about where water would go during storms, whether barriers would hinder navigation, and the impact it would have on the environment.

During an online hearing Monday night on the project, officials with the U.S. Army Corps of Engineers said it could prevent $1.8 billion worth of storm damage a year when fully constructed.

The plans would be one of the most ambitious and expensive flood control efforts any U.S. state has yet taken to address back bay flooding, which is a major sources of storm damage at the Jersey Shore.